Auto

The values of the variables are not retained beyond the scope of a function in which they are declared. The values of the variables can be accessed only during the execution of a function. Whatever variables are declared in a function, they are assumed implicitly of auto storage type. For example in the following program segment. [Read more…] about Data Storage Type in C++

[Read more…] about Write C++ program is used for finding the real root of an equation by Newton Raphson technique

[Read more…] about Write C++ Program Illustrates Passing Structure To A Function.

Arguments in a function can also be of array type. When the arrays are passed by value in a function, it is written as shown in the following example: [Read more…] about Array as Argument in A Function in C++

A recursive function is a function which invokes itself repeatedly. In this case function name appears within the function. Two examples of recursive function are given as follows: [Read more…] about Recursive Function

A function can also return values to the calling program. For such functions, the type of the value returned to the calling function should be mentioned before the function name in the definition. The general syntax of a function which returns value is: [Read more…] about Functions With or Without Return Value

In some cases when a similar action is to be performed on different types of data, different functions having different names are to be defined for all types of data. This makes the program very complex as the programmer must keep a track of the names of all the functions defined in the program. To prevent such situations, C++ allows the functions to be overloaded. [Read more…] about Function Overloading

[Read more…] about A program to demonstrate the concept of returning a reference

[Read more…] about A program to demonstrate the concept of functions returning values

Any value assigned to an automatic variable within a function is lost once the control returns from the called function to the calling function. However, there may be a situation where the value of the local variable needs to be preserved even after the execution of the function gets over. This need can be fulfilled by declaring the variable as static. A static variable is commonly used when it is necessary for a function to remember a value between its calls. To understand the concept of static variables, consider this example. [Read more…] about Static Variables Within Functions in C ++

Like C, C++ enables to pass arguments to the main () function also. These arguments are passed by typing them after the program name on the command line. Hence, these arguments are known as command line arguments. Command line arguments help in providing data to the program. [Read more…] about Arguments to main () in C ++

In addition to call by value, a function can also be called by reference. C++ provides two ways of passing arguments as reference to a function. The arguments can be passed either as a reference type or as a pointer type. [Read more…] about C++ function Call by Reference

When a function is called by value, the values of the actual arguments are copied into the formal arguments and the function works with these copied values. As a result, any changes made to the copied value in the called function do not affect the value of the actual argument in the calling function. [Read more…] about C++ function call by value

In order to use a function in different parts of a program, the function must be called or invoked by another function. In C++, functions are called by specifying the name of the function, followed by the parentheses. The parentheses mayor may not contain a list of arguments depending on the function definition. [Read more…] about Invoking Functions in C++

In order to use a function in a program, the function must be first defined somewhere in a program. A function definition contains the code that specifies the actions to be performed. The syntax for defining a function is [Read more…] about Definition of Function in C++

Like variables, functions also need to be declared before they are used in programs. A function declaration is also known as function prototype. Function prototype is a model or a blueprint for a function that informs the C++ compiler about the return type, the function name, and the number and data type of the arguments passed to the function. Function name together with parameter list is known as function signature and it does not include return type of a function. The syntax for declaring a function is [Read more…] about What is Function Declarations or Function Prototype?